Sen. John McCain (R-Ariz.) said on Thursday that he will support the Senate Republicans’ tax plan, which GOP leadership wants to pass this week.

“After careful thought and consideration, I have decided to support the Senate tax reform bill. I believe this legislation, though far from perfect, would enhance American competitiveness, boost the economy, and provide long overdue tax relief for middle class families,” McCain said in a statement.

McCain added that the Senate legislation would “directly benefit all Americans, allowing them to keep a higher percentage of what they earn.”

McCain’s decision is the latest boost to Republicans, after every GOP senator voted to start debate on the legislation Wednesday evening.